引言当压力容器由于存在诸如管法兰之类的插入体时,其外形不再是某种单纯的几何形状,则对其进行应力分析是困难的。本文介绍一种简单的图解法,在插入体位于圆形封头或圆顶端部的情况下,可用以进行应力计算。通常的应力分析法有时无用,或不能给出可靠的结果。例如,压力容器的球形端部有一刚性的插入体,就是一例。在封头与插入体的接合处应力高度集中。虽然大多数压力容器是按有限单元法进 Introduction It is difficult to stress analyze a pressure vessel due to its presence as a simple geometric shape due to the presence of an insert, such as a pipe flange. This article presents a simple diagram that can be used for stress calculations when the insert body is at the end of a circular head or dome. The usual stress analysis is sometimes useless, or can not give reliable results. For example, a rigid insert at the spherical end of a pressure vessel is an example. The stress at the joint between the head and the insert is highly concentrated. Although most pressure vessels are based on the finite element method